build

windows: avoid UNC paths in `run_ui_editor` #12316

Job	Run time
build (ubuntu-latest)	4m 7s
build (macos-14)	3m 42s
build (windows-latest)	7m 31s
build (ubuntu-latest, --all-features)	5m 3s
Build jj-lib without Git support	41s
cargo-deny (advisories)	23s
cargo-deny (bans licenses sources)	31s
Check protos	1m 6s
Check that MkDocs can build the docs	22s
Check that MkDocs can build the docs with Poetry 1.8	29s
Check formatting	17s
Clippy check	2m 30s
	26m 42s

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